KR20200072561A - Field turret bearing repair and assembly - Google Patents

Abstract

In a three-row, roller bearing assembly coupling a ship to a turret, a bearing assembly having a support heat assembly disposed between an inner ring connected to the turret and an outer ring connected to the vessel, and a method for field repair of a damaged support heat assembly Arrays are provided. The coupler is secured to the existing inner ring stud bolt. The continuous bearing ring under the coupler is assembled and the supporting bearing arrangement is installed between the coupler and the bearing ring. The reaction plate is mounted on the ship. Each reaction plate has a book screw positioned directly below the bearing ring. The jack screw is rotated to raise the bearing ring and forms a flat surface for the support bearing arrangement. The turret axle load is transferred from the damaged support heat assembly to the support bearing arrangement.

Description

Field turret bearing repair and assembly

The present invention relates to turret structures for ships, such as offshore drilling or production vessels, and more particularly to turret bearing assemblies and bearing repair procedures that can be performed in situ.

Vessel mooring systems are well known in the art where a vessel can weather around a turret mooring on the seabed. The turret extends through a moon pool or cylindrical opening that extends through the ship's hull. The vessel is supported to rotate relative to the turret by a turret bearing structure disposed between the turret and the vessel. Horizontal and vertical bearings carry the horizontal and vertical loads between the turret and the ship.

United States Patent No. 8,671,864, issued March 18, 2014 in the name of Lindblade et al., discloses this turret mooring system. FIG. 1 of the '864 patent discloses a bow of a vessel with a moonpool extending through the vessel hull. The turret is mounted in the moonpool and the ship rotates around it. Moonpools are usually circular in cross-section, and turrets are usually cylindrical to fit within the moonpool. Anchor legs are connected to the turret and fixed to the seabed by suitable anchors to limit turret rotation. The risers extend from the seabed wellheads or distribution facilities at the seabed and extend into the turret. The manifold deck includes a valve supported at the upper end of the turret and connected to the riser. A swivel stack extends upward from the turret and manifold deck and allows fluid to be transferred from the turret to the vessel. The turret is supported by the vessel by the turret bearing assembly.

One type of commonly used turret bearing assembly is an integrated three-row roller bearing assembly as shown and disclosed in U.S. Patent No. 5,893,784 issued April 13, 1999 by Boatman. The three-row roller bearing assembly includes a circular array of support rollers radially aligned with respect to the turret to support the turret weight. Any uplifting turret force is resisted by the second set of radially aligned rollers. The third set of rollers, coaxially aligned with the turret, serves to transfer radial loads between the vessel and the turret. The three bearing rows of the three-row roller bearing assembly are preferably lubricated and sealed in the cavity volume by sealing to provide protection from the elements and prevent corrosion. The integrated three-row roller bearing assembly is a precise assembly that requires a high level of flatness for proper load distribution and is somewhat tolerant to distortion and deformation, which results in high point load stress on the selection roller.

Most three-row roller bearing assemblies on offshore turret systems cannot be replaced or repaired in the field due to factors such as size, weight and access to various components. This bearing assembly is designed for the life of the system, but in the event of a failure or problem, there is no design or method to solve the major problem in the field. Since large vertical loads are always present in the bearing support rows, wear problems are most likely to occur.

U.S. Patent No. 8,197,293, assigned to Bluewater Energy Services B.V., discloses first installing the secondary bearing assembly in place and loading the secondary bearing assembly when the primary bearing assembly is no longer functioning. One drawback to this is that including two bearing assemblies (one as a spare) is expensive and negatively affects capital costs.

It would be desirable to be able to replace or repair a damaged turret three-row roller bearing assembly in the field. It would also be desirable to be able to replace or repair a damaged turret three-row roller bearing assembly while the ship is staying at the station. It would be desirable to remove large vertical loads from existing bearing support rows and allow the vessel to stay at the station. It would be desirable to be able to provide a new vertical load path in the field as the ship rotates around the turret.

The present invention provides repairs to turret bearing assemblies with damaged support heat rollers and/or support races. Repairs can be performed and assembled offshore in the field, and the load is transferred from the support race of the main turret bearing and to a new replacement race in a single lift sequence, simplifying work and minimizing the time to perform load transfer. do. In addition, this arrangement eliminates the need to uninstall the ship from the offshore location to perform repair work on the damaged bearing assembly, thereby reducing significant risk and cost impact to the ship owner.

It is an aspect of the present invention to remove the axial load from the damaged three-row roller bearing assembly in place and allow the vessel to continue to rotate freely or with assistance. The present invention removes the load from the existing bearing support column and transfers it to the repair bearing support column. The radial load will continue to be transmitted through the main bearing.

The present invention will be more readily understood through the following description and accompanying drawings.
1 is a cross-sectional view of a prior art integrated three-row roller bearing assembly for rotatably connecting a turret within a vessel's moonpool, which is a single and top and bottom arrangement of radially aligned rollers to transmit axial forces. Shows the intermediate coaxial arrangement of the rollers to deliver radial loads lying side by side within the sealed lubrication volume.
2 and 3 are partial perspective views in cross section of a three-row roller bearing assembly arrangement repaired with a plain bearing according to a preferred embodiment of the present invention, which also shows a part of the ship support structure and the turret structure.
4 is a partial cross-sectional view of a repaired three-row roller bearing assembly arrangement according to the embodiment shown in FIGS. 2 and 3, without the use of a spreader bar.
5 and 6 are perspective views of a partial cross-section of a three-row roller bearing assembly arrangement repaired with a roller bearing according to a second preferred embodiment of the present invention, which also shows a part of the ship support structure and the turret structure.
7 is a partial cross-sectional view of a repaired three-row roller bearing assembly arrangement according to the embodiments shown in FIGS. 5 and 6.
8 is a partially enlarged view of the support roller bearing assembly according to the second preferred embodiment.

1 shows a cross-sectional view of a typical three race roller bearing assembly 10 used in many turret systems. In this system, the turret has a single three race roller bearing assembly 10 installed to respond to any loading action between the turret of the floating vessel and the turret support structure 14. The turret support structure 14 is part of the floating vessel and does not move relative to the floating vessel. The turret, represented by the turret structure 12, is geostationary and a floating vessel (including the turret support structure 14) is allowed to weather vane around a geostationary turret. The bearing assembly 10 is the only means of transmitting load across this rotating interface to the outer turret, or the inner turret without the lower bearing.

The three-row roller bearing assembly 10 includes a circular array of support rollers with support races and cages, all commonly referred to as support row assemblies 20. The circular array of support rollers is radially aligned with respect to the turret to support the turret weight. Any uplifting turret force is resisted by a second set of radially aligned rollers with uplift races and cages, all commonly referred to as uplift heat assemblies 40. A third set of rollers with radial races and cages or spacers, coaxially aligned with respect to the turret, all commonly referred to as radial row assemblies (60), is used to reduce the radial load between the vessel and the turret. It serves to convey. The third set of rollers for carrying radial loads typically have spacers between the rollers. However, sometimes the bearings are designed to be completely complementary, meaning that there are no radial cages or spacers, only rollers.

The lower support heat assembly 20 carries the largest load when an axial force acting downward is applied. Of the three rows of roller bearings, the bearing support rollers and races of the support column assembly 20 typically accept the largest loads and are likely to be damaged in medium to deep sea systems. Thus, in shallow depth systems, the bearing radial rollers and races 60 are most likely to be loaded and damaged. The preferred embodiment mainly deals with repair and replacement of the support race and roller 20.

The bearing race provides a roller rolling path. To realize the longest service life, the roller path of the bearing race needs to be as flat and round as possible to allow smooth load distribution on the roller itself.

Referring to Figure 1, the bearing inner ring 30 is a plurality of circumferentially spaced inner ring fasteners, preferably threaded stud bolts 32, washers 36, and nuts ( 34) to the turret structure 12. The bearing outer upper ring 42 and outer lower ring 22 are turret support structures of a floating vessel through a plurality of circumferentially spaced outer ring fasteners, preferably threaded stud bolts 46 and nuts 44. (14).

A preferred embodiment of the present invention addresses on-site repair or repair of the three-row roller bearing assembly 10 where the support row assembly 20 is damaged. Preferred embodiments have the purpose of on-site repair or maintenance while allowing the vessel to continue to rotate through free conditions or assistance. The preferred embodiment employs rolling elements or self-lubricating sliding bearing pads (ie plain bearings) to remove axial loads from the main support heat assembly 20. In a preferred embodiment, the axial load is taken under the existing bearing assembly 10 from the bearing inner ring 30 to the outer turret support structure 14. The axial load is preferably a new support bearing assembly from the damaged support heat assembly 20 of the existing three-row roller bearing assembly 10 using the jack screws or hydraulic jacks discussed below (ie, FIG. 2- The plain bearing assembly 100 shown in 4 or the support roller bearing assembly 200 shown in FIGS. 5-7) is delivered or redistributed. The radial load will continue to be transmitted through the existing main bearing assembly 10.

In one preferred embodiment, the plain bearing assembly 100 is installed under the existing main bearing assembly 10 as shown in FIGS. 2-4. When the plain bearing assembly 100 is installed, the plain bearing assembly 100 removes vertical and moment loads from the existing support column assembly 20, but the radial load path is the radial thermal assembly 60 of the existing main bearing assembly 10. ). The uplift rollers of the existing main bearing assembly 10 uplift thermal assembly 40 can be used for potential uplift or overturning moments.

This embodiment is vertical from the turret assembly 12 of the turret to the turret support structure 14 of the vessel through a plurality of existing inner ring stud bolts 32 of the bearing inner ring 30 as shown in FIGS. 2-4. React the load. The spherical washer 118 and the special nut 112, preferably threaded externally and internally, replace the existing washer 36 and lower nut 34 on the inner ring stud bolt 32. The coupler 110 and the coupler are screwed with a special nut 112 at the lower end of the existing inner ring stud bolt 32. The bearing disc 116 is inserted into the lower portion of each coupler 110 as shown in FIGS. 2 and 4. Preferably, the bearing disc 116 is made of self-lubricating, composite material. The set screw 114 fixes each coupler 110 with an existing inner ring stud bolt 32. The height of the coupler 110 with the bearing disc 116 is set to form a flat, flat bottom bearing surface for uniform load distribution.

The continuous bearing ring 120 is preferably formed by a plurality of bearing ring segments. The sliding surface 122, which is preferably stainless steel, is disposed in the upper portion of the bearing ring 120 and is positioned between the coupler bearing disc 116 and the bearing ring 120. The sliding surface 122 can be securely fixed to the bearing ring 120, for example by bolts 124, as shown in FIG. Preferably, the stainless sliding surface 122 forms a continuous ring that is divided into alternating and divided bearing rings 120. The bearing disc 116 of the coupler 110 is arranged and designed to slide on the stainless sliding surface 122 on the bearing ring 120 when the turret bearing repair process is completed.

Preferably, the plurality of reaction plates 126 and the plurality of support plates 130 are fastened to the turret head support structure 14 of the ship. Typically, the number of reaction plates 126 and the number of support plates 130 coincide with the number of radial stiffeners 16, for example 24. The plurality of holes 18A are drilled in the bottom plate 18 under the turret head support structure 14. Preferably, the hole 18A is axially aligned with the hole for the outer ring stud bolt 46. The hole 18A is a support plate 130, a reaction plate 126, and a support plate to the upper surface of the bottom plate 18 through a new large stud bolt 132 extending through the aligned holes in the bottom plate 18. Allow mounting of 130 and allow mounting of reaction plate 126 to the bottom surface of bottom plate 18. After installation of the nut 134, the new large stud bolt 132 is tensioned, preferably hydraulically, via a hydraulic tensioner 144 (FIG. 4).

Preferably, a plurality of spreader bars 136, such as a plurality of support plates 130, may be installed to further support the axial load of the turret structure 12. Each spreader bar 136 may be positioned directly on the support plate 130. Preferably, the spreader bar 136 is a nut () relative to the upper end of the two outermost new large stud bolts 132 connecting the support plate 130 to the bottom plate 18 as shown in FIGS. 2 and 3. 138). Located on and between the new longer outer ring studs 46' (FIG. 2) screwed with a spreader bar 136 and the two outermost large new stud bolts 132 axially aligned, The spreader bar 136 is attached to the turret head support structure 14 by replacing the existing outer ring stud 46. Referring to Figure 3, the spacer 140 causes the new longer outer ring stud 46' to tension without overloading the structure. This arrangement forms a rigid load response assembly attached to the existing structure.

A plurality of jack screws 142 are installed on the reaction plate 126 under and in contact with the continuous bearing ring 120 as shown in FIGS. 3 and 4. The plain bearing assembly 100 is loaded to a certain height by raising the turret structure 12 and turning a plurality of jack screws 142 through a hydraulic torque wrench to form a flat surface for bearing support.

The preferred method of installing the plain bearing assembly 100 in the field will now be described. The plurality of holes 18A are drilled through the bottom plate 18 of the turret support structure 14 around the perimeter of the turret support structure. The hole 18A is preferably substantially aligned with the outer ring stud bolt 46. The inner ring stud bolt 32 is de-tensioned one at a time, and the washer 36 and the lower nut 34 are replaced with an old washer 118 and a new special nut 112. The special nut 112 is preferably threaded inside and outside. The inner ring stud bolt 32 is re-tensioned such that a predetermined length protrudes below the lower special nut 112. For example, an inner ring stud bolt 32 of 10 millimeters may protrude below the special nut 112. Referring to FIG. 4, the upper portion 110A of each coupler 110 is formed with a screw therein, and allows the coupler 110 to be installed by screwing with a lower special nut 112. The couplers 110 are all preferably positioned at the same height by laser measurement. The set screw 114, which is screw-engaged with the screwed lower portion 110B of the coupler 110, is tightened against the bottom of the inner ring stud bolt 32 to maintain the proper height of the coupler 110. The self-lubricating, composite bearing disc 116 is installed at the lower end of the coupler 110.

In the preferred embodiment, the reaction plate 126, support plate 130 and spreader bar 136 are in sections sized to align and cooperate with five adjacent outer ring stud bolts 46. For each section, the existing inner three outer ring stud bolts 46 are removed. The plurality of support plates 130 are positioned on the top surface of the bottom plate 18 through five new large stud bolts received with holes 130A extending through each support plate 130. The nut 134 is attached to the upper end of the stud bolt 132.

The segments of the continuous bearing ring 120 and the continuous stainless sliding surface 122 are assembled together to form a continuous ring around the perimeter of the turret. Preferably, the continuous bearing ring 120 with the sliding surface 122 is supported, under the coupler 110, temporarily on the stand.

The individual reaction plates 126, preferably equipped with jack screws 142, are positioned under the bottom plate 18 in alignment with the corresponding support plates 130. Five new large stud bolts 132 of the corresponding support plate 130 are lowered through the bottom plate hole 18A and through the corresponding hole 126A of the reaction plate 126. The lower nut 134 is installed at the lower end of the large stud bolt 132 and the stud bolt 132 is tensioned. Preferably, a predetermined length of the large stud bolt 132 projects below the lower nut 134. If sufficient reaction plate 126 is installed to support the continuous bearing ring 120, the support stand can be removed. The remaining reaction plate 126 may be installed at this time.

The spreader bar 136 is spreader bar above the upper end of the five large stud bolts 132 such that the outer large stud bolts 132 extend through the outer lower holes 136A at each end of the spreader bar 136 at each end. It is installed by lowering (136). The nut 138 is screwed to the protruding upper end of the outer large stud bolt 132 and tensioned to secure the spread bar 136 with the lower reaction plate 126. The three new longer outer ring studs 46' are the outer upper ring 42, the outer lower ring 22, the turret support structure 14, and before being threaded into the threaded opening of the spreader bar 136. It is installed through the spacer 140. Referring to FIG. 3, the spacer 140 causes the new longer outer ring stud 46' to strain without overloading the structure. This arrangement forms a rigid load response assembly attached to the existing structure. Jacking screws 142 are then used to align the continuous stainless steel sliding surface 122 with the bearing disc 116. The plain bearing assembly 100 is loaded to a specific height by raising the turret assembly 12 and turning a plurality of jack screws 142 through a hydraulic torque wrench to form a flat surface for bearing support. The turret structure 12 is raised to remove vertical load from the damaged original support heat assembly 20.

The above-described embodiment of the plain bearing assembly 100 installed below the existing bearing assembly 10 provides the following advantages and features:

-Use the existing inner ring bolting 32 to react the load under the existing bearing assembly 10;

-Minimize high temperature work (eg welding or flame cutting);

-Use short lead time materials;

-Utilizes self-lubricating composite bearing materials used in many applications;

-Bending and tolerance are less important issues for compliant bearing materials;

-A higher level of breakout torque is required to rotate the chaintable (ie, turret structure 12);

-The jacking screw 142 is used to lift the chain table 12 to its original position; And

-The radial load path is maintained through the radial thermal assembly 60 of the existing bearing assembly 10.

The second preferred embodiment includes installing the support roller bearing assembly 200 in the field below the existing main bearing 10, as shown in FIGS. 5-7. The support roller bearing assembly 200 solution shares many of the same components as the plain bearing assembly 100 solution, so the plan of the two embodiments maximizes the uptime of a floating vessel, typically a floating production storage and offloading unit (FPSO). It is available to do. The support roller bearing assembly 200 solution also removes vertical and moment loads from the existing main bearing 10, while the radial load path is maintained through the radial thermal assembly 60 of the existing main bearing 10. . The uplift thermal assembly 40 of the existing main bearing 10 may use potential uplift or rollover moments. Using a roller, the second preferred embodiment remains a low torque solution similar to the original design.

Like the plain bearing assembly 100, this embodiment reacts vertical loads from the turret structure 12 to the existing inner ring stud bolt 32 and to the ship's turret support structure 14. The spherical washer 118 and the special nut 15, preferably externally and internally threaded, replaces the existing washer 36 and the lower nut 34 on the inner ring stud bolt 32. The coupler 210 is screwed with a special nut 112 at the lower end of the existing inner ring stud bolt 32. The set screw 214 fixes each coupler 210 with an existing inner ring stud bolt 32. The height of the coupler 210 is set to form a flat planar bearing surface for uniform load distribution.

The upper bearing ring 250 is preferably formed by a plurality of upper bearing ring segments. The self-lubricating composite bearing material ring 252 is disposed as an upper portion of the upper bearing ring 250 to absorb minute variations in the height of the coupler 210. The upper bearing ring 250 is divided to form a continuous ring. Preferably, the bearing material ring 252 forms a continuous ring that is divided and alternately divided with the divided upper bearing ring 250.

The continuous lower bearing ring 260 is preferably formed by a plurality of lower bearing ring segments. Hardened and ground steel races 262 are new rollers placed in the recesses of the upper bearing ring 250 and the lower bearing ring 260 and separated by cages 266. Provides a rolling element surface for 264. The lower bearing ring 260 is supported by a plurality of jack screws 242 mounted on the reaction plate 126.

In the ship side turret support structure 14, all assemblies are the same as the plain bearing assembly 100 embodiment described above with respect to FIGS. 2-4, with the exception of slightly different jack screws 242. As shown in FIG. 8, preferably the port 244 of the jack screw 242 is in fluid communication with the port 268 of the lower bearing ring 260, the steel race 262 of the support roller bearing assembly 200, Lubricates roller 264 and cage 266. A stiffening assembly comprising a reaction plate 126, a support plate 130, and a spreader bar 136 secured to the existing turret support structure 14 provides sufficient support for the rolling elements and refraction under load. Minimize.

This new support roller bearing assembly 200 is also loaded by lifting the turret structure 12 and turning a plurality of jack screws 242 with a hydraulic torque wrench to a specific height to form a flat surface for bearing support.

The preferred method of installing the support roller bearing assembly 200 in the field is performed in a similar manner to the plain bearing assembly 100. A plurality of holes 18A are drilled through the bottom plate 18 of the turret support structure 14 around the perimeter of the turret support structure 14 in the same manner as above. The inner ring stud bolt 32 is simultaneously tensioned and the washer 36 and the lower nut 34 are replaced by a spherical washer 118 and a special nut 112. The inner ring stud bolt 32 is retensioned such that a predetermined length projects below the lower special nut 112. For example, an inner ring stud bolt 32 of 10 mm may protrude below the special nut 112. The upper portion 210A of each coupler 210 is internally threaded and allows the coupler 210 to be screwed into the lower special nut 112. The couplers 210 are all positioned at the same height, preferably by laser measurement. The set screw 214, which is screwed with the lower portion of the screw 210B of the coupler 210, is tightened against the bottom of the inner ring stud bolt 32 to maintain the proper height of the coupler 210. The height of the coupler 210 is set to form a flat planar bearing surface for uniform load distribution.

In the preferred embodiment, the reaction plate 126, support plate 130 and spreader bar 136 are in sections sized to align and cooperate with five adjacent outer ring stud bolts 46. For each section, the existing inner three outer ring stud bolts 46 are removed. The plurality of support plates 130 are positioned to the top surface of the bottom plate 18 through five new large stud bolts 132 received in holes 130A extending through each support plate 130. The nut 134 is attached to the upper end of the stud bolt 132.

The segments of the continuous lower bearing ring 260 are connected together and the hardened and crushed steel race segment 262 is installed in the upper recess of the continuous lower bearing ring 260. The steel race segment 262 is alternately divided into a lower bearing ring segment 260. The continuous lower bearing ring 260 with continuous steel lace 262 is assembled to form a continuous ring around the perimeter of the turret.

The segments of the continuous upper bearing ring 250 are connected together and the self-lubricating composite bearing material ring segment 252 is disposed as the upper portion of the upper bearing ring 250. The bearing material ring segment 252 is alternately divided into an upper bearing ring segment 250. The hardened and crushed steel race segment 262 is installed in the lower recess of the continuous upper bearing ring 250. The steel race segment 262 is alternately divided with the upper bearing ring segment 250. In a preferred embodiment, the upper bearing ring 250 includes an upper upper bearing segment 250A and a lower upper bearing ring segment 250B, which are alternately divided and together to form a continuous upper bearing ring 250. Is fixed.

Referring to FIG. 8, new support rollers 264 and cages 266 are installed between the upper and lower support races 262 of the lower and upper recesses of the upper bearing ring 250 and lower bearing ring 260. . Preferably, the assembled upper and lower bearing rings 250, 260 with support rollers 264, cage 266, and lace 262 are temporarily supported under the coupler 210 on the stand.

The individual reaction plates 126, with the jack screws 242 preferably installed, are located under the bottom plate 18 aligned with the corresponding support plates 130. Five new large stud bolts 132 of the corresponding support plate 130 are lowered through the bottom plate hole 18A and through the corresponding hole 126A of the reaction plate 126. The lower nut 134 is installed at the lower end of the large stud bolt 132 and the stud bolt 132 is tensioned. Preferably, the predetermined length of the large stud bolt 132 projects below the lower nut 134. If sufficient reaction plates 126 are installed to support the assembled upper and lower bearing rings 250, 260 with support rollers 264, cage 266 and rage 262, the support stand can be removed. The remaining reaction plate 126 can then be installed.

The spreader bar 136 is spreader bar over the upper end of the five large stud bolts 132 such that the outer large stud bolt 132 extends through the outer lower hole 136A at each end of the spreader bar 136 at each end. It is installed by lowering (136). The nut 138 is screwed to the protruding upper end of the outer large stud bolt 132 and tensioned to secure the spreader bar 136 to the lower reaction plate 126. Three new elongated outer ring studs 46' are external upper ring 42, outer lower ring 22, turret support structure 14 and spacer 140 before being threaded into the threaded opening of spreader bar 136. ). Spacer 140 allows the new long outer ring stud 46' to be tensioned without overloading the structure. This arrangement forms a rigid load response assembly attached to the existing structure. The jacking screw 242 is then used to align the upper bearing material ring 252 of the upper bearing ring 250 with the coupler 210. The support roller bearing assembly 200 is loaded to a specific height by forming a flat surface for bearing support and rotating a plurality of jack screws 242 through a hydraulic torque wrench to lift the turret structure 12. The turret structure 12 is raised to remove vertical loads from the damaged original support heat assembly 20.

An embodiment of the support roller bearing assembly 200 installed below the existing bearing assembly 10 provides the following advantages and features:

-Use the existing inner race bolting 32 to react with the load under the existing bearing assembly 10;

-Minimize high temperature operation;

-Use short lead time materials, except for possible rollers 264 and cured races 262;

-Utilizes a roller 264 seated on a cured race 262 similar to that used for split bearings;

-Bending and tolerances, which are problems with roller loading, are assisted by a bearing material ring 252;

-A lower level of breakout torque is required to rotate the chain table (ie, turret structure 12);

-The jacking screw 242 is used to lift the chain table 12 to its original position; And

-The radial load path is maintained through the radial thermal assembly 60 of the existing bearing assembly 10.

While the invention has been described in detail above with reference to specific embodiments, it will be understood that modifications and variations of the disclosed embodiments can be made by those skilled in the art without departing from the spirit and scope of the invention. All such modifications and changes are included. In addition, all publications cited herein represent the level of those skilled in the art and are each individually incorporated by reference and incorporated by reference in its entirety as fully presented.

Claims (24)

A three-row roller bearing assembly (10) for rotatably coupling a vessel to a turret (12), the three-row roller bearing assembly comprising a support heat assembly (20), a radial heat assembly (60) and an inner ring connected to the turret ( 30) and an uplift heat assembly 40 disposed between the lower ring 22 connected to the vessel, a plurality of inner ring stud bolts 32 securing the inner ring to the turret and a plurality of outer ring studs In the three-row roller bearing assembly (10), wherein the bolt (46) secures the outer upper and lower rings to the vessel, as a method for field repair of the damaged supporting thermal assembly (20),
Fixing a coupler 110 to a lower end of each of the plurality of inner ring stud bolts 32;
Assembling a continuous bearing ring (120) below the coupler (110) and around the perimeter of the turret (12);
Installing a support bearing arrangement (200) between the coupler (110) and the continuous bearing ring (120);
Providing a plurality of reaction plates 126, wherein each reaction plate has at least one jack screw 142 mounted thereon;
Mounting a plurality of reaction plates 126 to the turret support structure 14 of the ship, wherein the jack screw 142 is located directly under the continuous bearing ring 120;
Lifting the continuous bearing ring 120 and turning the plurality of jack screws 142 to form a flat surface for support of the support bearing arrangement 200; And
A method for on-site maintenance of a damaged support heat assembly (20), comprising: delivering a axial load of the turret (12) from the damaged support heat assembly (20) to the support bearing arrangement (200). The method according to claim 1,
The step of assembling the continuous bearing ring (120) includes connecting a plurality of bearing ring segments in adjacent relationships, a method for field repair of a damaged support heat assembly (20). The method according to claim 2,
The step of installing a support bearing arrangement 200 between the coupler 110 and the continuous bearing ring 120 is:
Installing a bearing disc 116 at the lower end of each coupler; And
And installing a continuous sliding surface (122) on the top portion of the continuous bearing ring. The method according to claim 3,
The bearing disc 116 is an auto-lubricating composite material and the continuous sliding surface 122 is stainless steel, a method for field repair of a damaged support heat assembly 20. The method according to claim 1,
A method for field repair of a damaged support heat assembly (20), further comprising positioning all of the couplers (110) to the same height. The method according to claim 2,
The continuous bearing ring 120 is a continuous lower bearing ring 260 and the step of installing a support bearing arrangement 200 between the coupler 110 and the continuous bearing ring 120 is:
Installing a continuous lower race 262 in the upper recess of the continuous lower bearing ring 260;
Assembling the continuous upper bearing ring (250);
Installing a continuous upper race (262) in the lower recess of the continuous upper bearing ring (250); And
A step of installing a plurality of support rollers 264 and a cage 266 between the upper race and the lower race of the recess of the upper and lower bearing rings; including, for on-site maintenance of the damaged support heat assembly 20 Way. The method according to claim 6,
A method for field repair of a damaged support heat assembly (20), further comprising positioning all of the couplers (110) to the same height. The method according to claim 1,
The step of mounting the plurality of reaction plates 136 to the turret support structure 14 of the ship is:
Providing a plurality of holes in the reaction plate;
Providing a plurality of support plates 130, wherein each support plate corresponds to a plurality of holes in each reaction plate and has a plurality of holes arranged as a plurality of holes in each reaction plate;
Forming a plurality of holes in the bottom plate 18 of the ship's turret support structure;
Placing each support plate on top of the bottom plate and placing each reaction plate under the bottom plate;
Axially aligning a plurality of holes of each support plate with holes formed in the bottom plate and a corresponding plurality of holes of each support plate;
Inserting a large stud bolt through the plurality of axially aligned holes; And
Tensioning the large stud bolt and nut; including, method for field repair of damaged support heat assembly (20). The method according to claim 8,
The step of mounting the plurality of reaction plates 126 to the turret support structure 14 of the ship is:
Providing a plurality of spreader bars 136, wherein each spreader bar has three upper openings and two lower holes;
Placing each spreader bar over a corresponding support plate 130;
Aligning the two lower holes with two of the large stud bolts securing the corresponding support plate;
Securing each spreader bar to two large stud bolts securing the corresponding support plate;
Replacing the three outer ring stud bolts vertically positioned over the large stud bolts holding the corresponding support plate with three new long outer ring stud bolts 46';
Fixing the new long outer ring stud bolt to the spreader bar; And
And tensioning the three new long outer ring stud bolts. The method according to claim 9,
The three upper openings of the spreader bar (136) are threaded and screwed with three new long outer ring stud bolts (46'), a method for field repair of a damaged support heat assembly (20). The method according to claim 8,
The step of installing a support bearing arrangement 200 between the coupler 110 and the continuous bearing ring 120 is:
Installing a bearing disc 116 at the lower end of each coupler; And
And installing a continuous sliding surface (122) on the top portion of the continuous bearing ring. The method according to claim 11,
The bearing disc 116 is an auto-lubricating composite material and the continuous sliding surface 122 is stainless steel, a method for field repair of a damaged support heat assembly 20. The method according to claim 8,
The continuous bearing ring 120 is a continuous lower bearing ring 260, and the step of installing a support bearing arrangement 200 between the coupler 110 and the continuous bearing ring is:
Installing a continuous lower race (262) in the upper recess of the continuous lower bearing ring;
Assembling the continuous upper bearing ring (250);
Installing a continuous upper race (262) in the lower recess of the continuous upper bearing ring (250); And
A step of installing a plurality of support rollers 264 and a cage 266 between the upper race and the lower race of the recess of the upper and lower bearing rings; including, for on-site maintenance of the damaged support heat assembly 20 Way. The method according to claim 13,
A method for field repair of a damaged support heat assembly (20), further comprising positioning all of the couplers (110) to the same height. A floating vessel having a turret support assembly 14 that rotates about the turret 12, a mooring structure extending from the turret to the seabed, and a bearing structure rotatably supporting the turret to the turret support structure of the vessel However, the bearing structure transmits the vertical load of the turret to the ship, and the support heat assembly 20 located between the inner ring 30 and the outer lower ring 22, a plurality of inner ring fasteners securing the inner ring to the turret (32, fasteners) and a plurality of outer ring fasteners 46 that secure the outer lower ring to the ship's turret support structure, in a marine system, the field maintenance arrangement for a damaged support heat assembly 20 is:
A plurality of couplers 110 fixed to the lower ends of each inner ring fastener 32;
A continuous bearing ring 120 under the plurality of couplers and around the perimeter of the turret;
A support bearing arrangement 200 between the plurality of couplers and the continuous bearing ring;
A plurality of reaction plates 126 mounted on the turret support structure of the ship;
A plurality of jack screws 142 mounted on the plurality of reaction plates, wherein each reaction plate has at least one jack screw mounted thereon, and the plurality of jack screws are located directly under the continuous bearing ring. ;
Here, the plurality of jack screws are arranged and designed to lift the continuous bearing ring and form a flat surface for support of the support bearing arrangement, field repair arrangement for a damaged support heat assembly (20). The method according to claim 15,
The plurality of jack screws 142 are arranged and designed to lift the continuous bearing ring 120 and transfer the axial load of the turret from the damaged support heat assembly 20 to the support bearing arrangement, a damaged support heat assembly ( On-site maintenance arrangement for 20). The method according to claim 15,
The support bearing arrangement 200 is:
A plurality of bearing discs 116 at the lower end of each coupler 110; And
An on-site maintenance arrangement for a damaged support heat assembly (20) comprising a continuous sliding surface (122) of the upper portion of the continuous bearing ring (120). The method according to claim 17,
Each of the plurality of bearing discs 116 is an auto-lubricating composite material and the continuous sliding surface 122 is stainless steel, in-situ repair arrangement for a damaged support heat assembly 20. The method according to claim 15,
The continuous bearing ring 120 is a continuous lower bearing ring 260 and the support bearing arrangement 200 is:
A continuous lower race 262 of the upper recess of the continuous lower bearing ring;
Continuous upper bearing ring 250;
A continuous upper race 262 of the lower recess of the continuous upper bearing ring; And
And a plurality of support rollers 264 and cages 266 between the upper and lower races of the recesses of the upper and lower bearing rings. A repair support heat assembly arrangement for a damaged support heat assembly (20) of a bearing structure rotatably supporting a turret (12) in a turret support structure (14) of a floating vessel, wherein the damaged support heat assembly is configured to reduce the vertical load of the turret. Located between the inner ring 30 fixed to the turret with a plurality of inner ring fasteners 32 and the outer lower ring 22 fixed to the turret support structure of the ship with a plurality of outer ring fasteners 46 transmitted to the ship. , Maintenance support heat assembly arrangement:
A plurality of couplers 110 arranged and designed to be fixed to the lower end of each inner ring fastener;
A continuous bearing ring 120 arranged and designed to be positioned under the plurality of couplers and around the perimeter of the turret;
A support bearing arrangement 200 arranged and designed to be positioned between the plurality of couplers and the continuous bearing ring;
A plurality of reaction plates 126 arranged and designed to be mounted on the ship's turret support structure;
A plurality of jack screws 142 arranged and designed to be mounted on the plurality of reaction plates, wherein each reaction plate is arranged and designed to have at least one jack screw mounted thereon, wherein the plurality of jack screws are It is arranged and designed to be positioned directly below the continuous bearing ring; and
Wherein the plurality of jack screws are arranged and designed to lift the continuous bearing ring and form a flat surface for support of the support bearing arrangement. The method according to claim 20,
The plurality of jack screws 142 are arranged and designed to lift the continuous bearing ring 120 and transfer the axial load of the turret 12 from the damaged support heat assembly 20 to the support bearing arrangement 200. , Maintenance support heat assembly arrangement. The method according to claim 20,
The support bearing arrangement 200 is:
A plurality of bearing discs 116 at the lower end of each coupler 110; And
A repair support heat assembly arrangement comprising a continuous sliding surface (122) of the upper portion of the continuous bearing ring (120). The method according to claim 22,
Each of the plurality of bearing discs 116 is an auto-lubricating composite material and the continuous sliding surface 122 is stainless steel, a maintenance-supporting thermal assembly arrangement. The method according to claim 20,
The continuous bearing ring 120 is a continuous lower bearing ring 260 and the support bearing arrangement 200 is:
A continuous lower race 262 of the upper recess of the continuous lower bearing ring;
Continuous upper bearing ring 250;
A continuous upper race 262 of the lower recess of the continuous upper bearing ring; And
And a plurality of support rollers 264 and cages 266 between the upper and lower races of the recesses of the upper and lower bearing rings.

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